CN102909237B - A kind of preparation method of TA18 thick-wall tube - Google Patents

A kind of preparation method of TA18 thick-wall tube Download PDF

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Publication number
CN102909237B
CN102909237B CN201210477651.0A CN201210477651A CN102909237B CN 102909237 B CN102909237 B CN 102909237B CN 201210477651 A CN201210477651 A CN 201210477651A CN 102909237 B CN102909237 B CN 102909237B
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rolling
thick
tube
pipe
adopts
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CN102909237A (en
Inventor
李永林
朱宝辉
刘守田
刘彦昌
任丽萍
王培军
韩宝峰
巴万兴
鞠顺
李陈
袁红军
王益
沈立华
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Ningxia Orient Tantalum Industry Co Ltd
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Ningxia Orient Tantalum Industry Co Ltd
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Abstract

The present invention relates to a kind of preparation method of TA18 thick-wall tube, its technical process comprises ingot casting casting, forging, pipe preparation, surface treatment, rolling and aligning, it is characterized in that: described rolling adopts the cold rolling mode of two rollers.The present invention (1) is by the cold rolling mode of production of employing two roller, and pipe directly obtains finished product through 1 ~ 3 two roller are cold rolling; (2) by taking inner surface bore hole, the mode of outer surface grinding and polishing reaches and improves the object of surface quality; (3) linearity by taking the mode of thermal straightening to ensure that product.The present invention can shorten life cycle of the product greatly, improves the surface quality of product, and ensure that the linearity of product.<u/>

Description

A kind of preparation method of TA18 thick-wall tube
Technical field
The present invention relates to nonferrous materials technical field, particularly relate to a kind of preparation method of petroleum industry TA18 thick-wall tube.
Background technology
The alpha and beta type titan alloy of the TA18 titanium alloy a kind of near α that to be the U.S. develop in late 1960s, nominal composition is Ti-3Al-2.5V.This alloy not only has good room temperature, mechanical behavior under high temperature and corrosion resisting property, and has excellent cold and hot working processing performance, formability and welding performance.The combination property of this alloy excellence makes it be widely used in aircraft engine hydraulic pressure and fuel piping system, and also has a large amount of uses in oil, medical treatment and Leisure Sport field.
Domesticly start to carry out Ti-3Al-2.5V alloy research mid-term in 20 century 70s, in the chemical composition, Properties Control etc. of material, possessed the technology of comparative maturity at present, and there is certain production capacity.But generally adopt cold rolling by two rollers and that three rollers are cold rolling mode to produce this alloy pipe, although cold pilgered pipe technique has unique process characteristic and the mode of production flexibly, production super-large diameter, special thin-walled, great surface quality and high-strength low moulding in seamless pipe etc., there is the irreplaceable status of other tube-making processes, but relative to producing the above-mentioned mode of production of TA18 thick-walled pipe and exist the shortcoming of production cycle long, surface quality heterogeneity and product linearity Customers ' Legal Right.
Petroleum industry TA18 thick-walled pipe (φ 35 ~ 48 × 2.5 ~ 5) requires that its surfaces externally and internally quality is homogeneous, especially linearity requires high (0.3 ~ 1mm/m), mechanical property meets common standard and requires to get final product (tensile strength >=621MPa, yield strength >=517MPa, percentage elongation >=15%).
The several patented technologies provided below are all used to prepare thick-wall tube, their exist or technique loaded down with trivial details, or the defect such as technological requirement is high.
Chinese patent CN 1718798 A discloses Ti alloy with high performance pipe formula and technique, the formula of the method titanium alloy tube, Al, 2.5-3.5wt%, V, 2.0-3.0wt%'s, surplus is Ti, cold working manufactures the method for titanium or titanium alloy pipe, through the temperature ranges of 350 DEG C to 600 DEG C 0.5-2 hour process and after annealing, carry out finish rolling, anneal to eliminate stress in the scope of 0.5-1 hour through the temperature of 300 DEG C to 400 DEG C after rolling.The formula of this invention is fairly simple and by dependable performance under processing conditions of the present invention, secondary is stepped back all only needs lower treatment temperature, and energy consumption is low.And it is high by the precision of finish-rolling process product.Its tensile elastic ultimate strength is comparatively large, and its elastic deformability is more than 15%.Clearly concrete rolling mill practice is not had, surface treatment method and thermal straightening technology in this patent.
Chinese patent CN 101451631 A discloses special titanium alloy tube for petroleum detection and preparation technology thereof, the invention belongs to the special tubing of petroleum detection in oil exploration equipment technology field.It makes tubing with adding the titanium alloy that metallic aluminium and vanadium metal make in Titanium.This invention titanium alloy makes titanium alloy pipe in accordance with the following steps: (1) rolling: first extruded by extruder by original blank or pipe is processed in roll piercing, then the burr crackle on surface is fallen by abrasive machine reconditioning, by deep hole lathe, the crackle of endoporus is removed, by more than 2 times roll formings; (2) anneal when deflection is greater than 10% in step (1), reconditioning, annealing temperature 560-640 degree, insulation 2-4 hour, room temperature is come out of the stove.Advantage of the present invention is that titanium alloy pipe is nonmagnetic, corrosion-resistant, high pressure resistant and intensity is high, extends service life, the complete design requirement that the titanium alloy tube processed by the present invention can be higher.Clearly concrete rolling mill practice and thermal straightening technology is not had in this patent.
Chinese patent CN 102389900 A discloses a kind of high accuracy processing method of TA18 aviation titanium pipe, and the method is: one, carry out straightening processing to TA18 pipe; Two, load at tube blank inner wall uniform application chlorinated paraffin-52 the semi-finished product tubing that the first mandrel rolling becomes required size; Three, the first plug in semi-finished product tubing is taken out, after smearing chlorinated paraffin-52, load the tubing that the second mandrel rolling becomes required size; Four, repeat step 31 ~ 8 time, obtain TA18 aviation titanium pipe.This technical matters is loaded down with trivial details, especially rolling mill practice.
Chinese patent CN 101837386 A discloses a kind of manufacture method of titanium alloy thick-wall pipe, the method is a kind of manufacture method of titanium alloy thick-wall pipe, be applicable to the hot-stretch manufacture of Ti-6Al-4V titanium alloy thick-wall pipe, its feature includes following steps: (1) blank prepares; (2) heating of pipe blank; (3) hot-stretch; (4) heat strips off the skin; (5) thermal straightening; (6) surface film oxide is ground off; (7) scale blanking; (8) polishing, obtains qualified product.The present invention adopts new heat stretching process to produce Ti-6Al-4V titanium alloy thick-wall pipe, overcomes the shortcoming of conventional borehole method, has the advantages that efficiency is high, quality good, lumber recovery is high.
Chinese patent CN 102240890 A discloses a kind of manufacture method of thick-walled titanium tube, and first the method prepares ingot casting; Pipe is squeezed into by after ingot casting forging, processing, then pickling; Be rolled the pipe after pickling, every rolling is complete once carries out oil removal treatment and recrystallization annealing process successively to the pipe after rolling; Again a rolling is carried out to the pipe after rolling and obtain finished product tubing; After finally finished product tubing being carried out annealing in process, the oxide skin on inside and outside surface is removed in pickling, obtains Gr.3 thick-walled titanium tube.Clearly concrete surface treatment method and thermal straightening technology is not had in this patent.
Summary of the invention
The object of the invention is to the defect overcoming above-mentioned prior art, a kind of surface quality that effectively can improve product is provided, ensure the linearity of product, shorten the preparation method of the TA18 thick-wall tube of production cycle.
The present invention takes following technical proposals:
A preparation method for TA18 thick-wall tube, its technical process comprise ingot casting casting, forging, pipe preparation, surface treatment, rolling and and aligning, it is characterized in that: described rolling adopts the cold rolling mode of two rollers.
In above-mentioned cold-rolled process, controlled rolling speed is 10 ~ 60 beats/min, and rolling feed is 2 ~ 8mm, and each pass deformation is 20 ~ 50%, and general working rate is 30 ~ 70%.
In above-mentioned cold-rolled process, cogging 1-3 passage is directly cold-pressed into finished product.
Above-mentioned pipe preparation adopts pressing method or roll piercing method.
In described pressing method, extrusion temperature is 700 ~ 850 DEG C, is incubated 1 ~ 3 hour.
Described roll piercing method pipe roll piercing heating in medium frequency temperature is 750 ~ 950 DEG C, is incubated 10 ~ 30 minutes.
During above-mentioned surface treatment, internal surface of bloom adopts bore hole process, bore hole amount 0.2 ~ 1.5mm, and outer surface adopts the mode of machine glazed finish, grinding and polishing amount 0.1 ~ 0.3mm.
Above-mentioned aligning adopts thermal straightening, and heating-up temperature is 500 ~ 600 DEG C.
Before cold rolling and after finished product TA18 thick-wall tube obtains, all will carry out vacuum annealing heat treatment, annealing temperature is 600 ~ 800 DEG C, and be incubated 1 ~ 2 hour, vacuum is not less than 1 × 10 -1pa.
Technical solution of the present invention compared with prior art, has following beneficial effect and advantage:
(1) by the mode of production that employing two roller is cold rolling, pipe directly obtains finished product through 1 ~ 3 two roller are cold rolling.
(2) by taking inner surface bore hole, the mode of outer surface grinding and polishing reaches and improves the object of surface quality.
(3) linearity by taking the mode of thermal straightening to ensure that product.
In sum, the present invention can shorten life cycle of the product greatly, improves the surface quality of product, and ensure that the linearity of product.
Detailed description of the invention
Below specific embodiments of the invention, only as further illustrating of the present invention, not as limitation of the present invention; for those skilled in the art; under the prerequisite not departing from thinking of the present invention, done part is improved or change, all should belong to protection scope of the present invention.
(1) ingot casting preparation: adopt titanium sponge and aluminum-vanadium alloy according to (2.0≤Al≤3.5%, 1.5≤V≤3.0%, C≤0.08%, N≤0.05%, H≤0.015%, O≤0.12%, Fe≤0.25%, surplus is Ti) proportioning carry out batching and electrode pressing block, electrode block carries out Combination Welding and prepares one-time electrode, then carries out two to three vacuum consumable arc-meltings and prepares ingot casting.
(2) forge: the φ 600mm ingot casting obtained by (1), through time (880 ~ 1100 DEG C/2 ~ 6h) forging of three fire to φ 220mm or φ 180mm rod base.
(3) pipe preparation: adopt pressing method or roll piercing method to carry out pipe preparation.First to strip off the skin to excellent base before extruding and hole and carry out face coat and coated copper sheet process (outer surface adopts the copper sheet volume weldering of 1mm thickness, and inner surface adopts the copper pipe of 1.5mm thickness).Supplementary extrusion temperature is 700 ~ 850 DEG C, is incubated 1 ~ 3 hour; In oblique milling method, pipe roll piercing heating in medium frequency temperature is 750 ~ 950 DEG C, is incubated 10 ~ 30 minutes.
(4) surface treatment: pickling and washing or alkali cleaning, pickling and washing removing face coat or surface scale need be carried out (at HF:H to hot-working pipe 2sO 4: HNO 3: H 2o=1.5 ~ 2.5:20:34 ~ 39:100(volume ratio) in mixed liquor, soak 1 ~ 3 hour), carry out surface again and strip off the skin (machinery strips off the skin or manual scraper), inner surface adopts bore hole process, bore hole amount 0.2 ~ 1.5mm, finished product outer surface adopts the mode of machine glazed finish, grinding and polishing amount 0.1 ~ 0.3mm.
(5) rolling: (annealing temperature 600 ~ 750 DEG C, temperature retention time 1 hour, is not less than 1 × 10 to adopt vacuum heat before rolling -1pa) and after (4) process be directly rolled, adopt two rollers cold rolling cogging one to three passage Direct Rolling finished product.Pipe or semifinished tube inner surface use chlorinated paraffin wax, outer surface to use machine oil and paraffin mixed liquor to lubricate, and mill speed is 10 ~ 60 beats/min, and rolling feed is 2 ~ 8mm, and each pass deformation is 20 ~ 50%, and general working rate is 30 ~ 70%.
(5) thermal straightening: all will carry out thermal straightening for middle and the heat treated pipe of finished product, heating-up temperature is 500 ~ 600 DEG C.
(6) oil removal treatment: need to carry out oil removal treatment for the tubing carrying out vacuum heat after cold rolling, first carries out Ultrasonic Cleaning oil removing or degreaser cleans, and then adopts pickling (HF:HNO 3: H 2o=5 ~ 12:45 ~ 60:100(volume ratio) in mixed liquor, soak 3 ~ 10min), washing and drying and processing.
(7) middle and finished product heat treatment: intermediate softening and finished product heat treatment all adopt vacuum annealing heat treatment, and annealing temperature is 600 ~ 800 DEG C, and be incubated 1 ~ 2 hour, vacuum is not less than 1 × 10 -1pa, the product through intermediate annealing can proceed rolling, and the product through finished products directly becomes finished product, or becomes finished product after overpickling and washing.

Claims (5)

1. the preparation method of a TA18 thick-wall tube, its technical process comprise ingot casting casting, forging, pipe preparation, surface treatment, rolling and and aligning, it is characterized in that: described rolling adopts the cold rolling mode of two rollers, cogging 1-3 passage is directly cold-pressed into finished product, controlled rolling speed is 10 ~ 60 beats/min, rolling feed is 2 ~ 8mm, each pass deformation is 20 ~ 50%, and general working rate is 30 ~ 70%;
During above-mentioned surface treatment, internal surface of bloom adopts bore hole process, bore hole amount 0.2 ~ 1.5mm, and outer surface adopts the mode of machine glazed finish, grinding and polishing amount 0.1 ~ 0.3mm;
Above-mentioned aligning adopts thermal straightening, and heating-up temperature is 500 ~ 600 DEG C.
2. according to the preparation method of TA18 thick-wall tube according to claim 1, it is characterized in that: above-mentioned pipe preparation adopts pressing method or roll piercing method.
3. according to the preparation method of TA18 thick-wall tube according to claim 2, it is characterized in that: in described pressing method, extrusion temperature is 700 ~ 850 DEG C, be incubated 1 ~ 3 hour.
4. according to the preparation method of TA18 thick-wall tube according to claim 2, it is characterized in that: described roll piercing method pipe roll piercing heating in medium frequency temperature is 750 ~ 950 DEG C, is incubated 10 ~ 30 minutes.
5. according to the preparation method of TA18 thick-wall tube according to claim 1, it is characterized in that: before cold rolling and after finished product TA18 thick-wall tube obtains, all will carry out vacuum annealing heat treatment, annealing temperature is 600 ~ 800 DEG C, be incubated 1 ~ 2 hour, vacuum is not less than 1 × 10 -1pa.
CN201210477651.0A 2012-11-22 2012-11-22 A kind of preparation method of TA18 thick-wall tube Expired - Fee Related CN102909237B (en)

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CN103894441B (en) * 2014-03-20 2016-06-29 宝鸡拓普达钛业有限责任公司 The processing method of TC4 titanium alloy thick-wall pipe material
CN103894442B (en) * 2014-03-26 2016-04-06 宁夏东方钽业股份有限公司 Tantalum pipe and preparation method thereof
CN103849803B (en) * 2014-03-26 2017-01-11 宁夏东方钽业股份有限公司 Tantalum alloy and method for preparing tantalum alloy tube
CN104232993B (en) * 2014-04-15 2017-03-08 宁夏东方钽业股份有限公司 A kind of high-performance TC11 pipe and preparation method thereof
CN105171348B (en) * 2015-09-07 2018-04-27 云南钛业股份有限公司 A kind of production method of TA10 alloy seamless pipe
CN108098269A (en) * 2017-12-18 2018-06-01 西安赛特思迈钛业有限公司 A kind of preparation for processing of high intensity high-precision Ti6Al4V titanium alloy pipes
CN109234555B (en) * 2018-10-24 2020-08-18 成都先进金属材料产业技术研究院有限公司 Preparation method of small-caliber TA18 titanium alloy seamless tube
CN109513766B (en) * 2018-11-15 2021-02-02 南通金尼新材料科技有限公司 Manufacturing method of high-concentricity martensitic stainless steel seamless pipe
CN112605123A (en) * 2020-11-30 2021-04-06 西北有色金属研究院 Preparation method of low-cost high-toughness titanium alloy pipe for ocean engineering

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368487A1 (en) * 1988-10-18 1990-05-16 Crucible Materials Corporation Welded corrosion-resistant ferritic stainless steel tubing and a cathodically protected heat exchanger containing the same
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